elp2000-82b's Introduction

ELP2000-82B

This library provides functionality to compute lunar positions and thus allowing contruction of lunar ephemerides.

It is based on semi-analytical theory ELP version ELP 2000-82B developed by M. Chapront-Touzé and J. Chapront at Bureau des Longitudes, Paris, France.

To find information on the theory itself, refer to the following original papers:

M. Chapront-Touzé and J. Chapront. The lunar ephemeris ELP 2000. Astronomy and Astrophysics, vol. 124, 1983, pp. 50-62.
M. Chapront-Touzé and J. Chapront. ELP 2000-85: a semi-analytical lunar ephemeris adequate for historical times. Astronomy and Astrophysics, vol. 190, 1988, pp. 342-352.
Lunar Solution ELP 2000-82B. Explanatory note.
J. Chapront and G. Francou. The lunar theory ELP revisited. Introduction of new planetary perturbations. Astronomy and Astrophysics, vol. 404, 2003, pp. 735-742.

As well as data files found through Vizier Catalog FTP service.

This library is implemented in C and needs be linked only against math library.

Provided files contain the following functionality

elp2000-82b is the main file of interest. It contains routines that compute lunar positions depending on desired output coordinates and reference frame. Refer to the header comments for more information.
arguments contains routines that compute arguments of the ELP theory. Among such, this file contains a routine to compute mean lunar arguments (Delaunay arguments), that may come in need while performing various lunar computations.
series contains auxiliary routines that compute Fourier and Poisson series of the ELP theory.
All other header files define arrays of coefficients of ELP theory and are of no practical use outside given library.

**If you find any errors or inconsistencies with this software, please contact me via [e-mail][2]**
Serhii Tsyba

18.08.2010
Helsinki, Finland

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